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<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
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    <title>Document</title>
</head>
<body>
<script>
    const obj = {
        msg: '你好',
        age: 18
    }

    // with (obj) {
    //     console.log(msg)
    // }

    function render() {
        // this
        with (this) {
            console.log(msg)
        }
    }
</script>
</body>
</html>
